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- W2964139214 abstract "Summary We consider tensors in the Hierarchical Tucker format and suppose the tensor data to be distributed among several compute nodes. We assume the compute nodes to be in a one‐to‐one correspondence with the nodes of the Hierarchical Tucker format such that connected nodes can communicate with each other. An appropriate tree structure in the Hierarchical Tucker format then allows for the parallelization of basic arithmetic operations between tensors with a parallel runtime that grows like , where d is the tensor dimension. We introduce parallel algorithms for several tensor operations, some of which can be applied to solve linear equations directly in the Hierarchical Tucker format using iterative methods such as conjugate gradients or multigrid. We present weak scaling studies, which provide evidence that the runtime of our algorithms indeed grows like . Furthermore, we present numerical experiments in which we apply our algorithms to solve a parameter‐dependent diffusion equation in the Hierarchical Tucker format by means of a multigrid algorithm." @default.
- W2964139214 created "2019-07-30" @default.
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- W2964139214 date "2018-03-26" @default.
- W2964139214 modified "2023-09-29" @default.
- W2964139214 title "Distributed hierarchical SVD in the Hierarchical Tucker format" @default.
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- W2964139214 doi "https://doi.org/10.1002/nla.2174" @default.
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